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Brinzolamide-loaded soft contact lens for ophthalmic delivery. Ther Deliv 2022; 13:233-247. [PMID: 35615865 DOI: 10.4155/tde-2022-0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: In this study, brinzolamide (BRZ) was loaded in balafilcon A silicone hydrogel soft contact lens to enhance delivery in glaucoma therapy. Materials & methods: BRZ-loaded soft contact lens was prepared by the soaking method with optimization of pH, temperature and concentration of drug loading solution. Results: At pH 7.4, loading temperature and concentration of 32°C and 3 mg/ml, respectively, enhanced drug loading capacity and release were observed. Diffusional experiments showed Higuchi model of release. BRZ loading brought no appreciable changes in the physical properties of soft contact lens, likewise, maintaining stability. Conclusion: The results demonstrated BRZ loading and delivery through silicone hydrogel soft contact lens which provides a potential alternative in glaucoma therapy.
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Salunke N, Kharkar PS, Pandita N. Study of degradation behavior of besifloxacin, characterization of its degradation products by LC-ESI-QTOF-MS and their in silico toxicity prediction. Biomed Chromatogr 2019; 33:e4489. [PMID: 30652327 DOI: 10.1002/bmc.4489] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 12/13/2018] [Accepted: 01/09/2019] [Indexed: 02/05/2023]
Abstract
Knowledge and understanding of the stability profile of a drug is important as it affects its safety and efficacy. In the present work, besifloxacin, a new, fourth-generation fluoroquinolone antibiotic, was subjected to different forced-degradation conditions as per International Conference on Harmonization (ICH) guidelines such as hydrolysis (acid, base and neutral), oxidation, thermal and photolysis. The drug degraded under acidic, basic, oxidative and photolytic conditions while it was found to be stable under dry heat and neutral hydrolytic conditions. In total, five degradation products (DPs) were formed under different conditions-DP1 and DP2 (photolysis), DP3 (oxidation), DP4 (acidic), DP3 and DP5 (basic). The chromatographic separation of besifloxacin and its degradation products was achieved on a Sunfire C18 (250 mm × 4.6 mm, 5 μm) column with 0.1% aqueous formic acid-acetonitrile as a mobile phase. The gradient RP-HPLC method was developed and validated as per ICH guidelines. The degradation products were characterized with the help of LC-ESI-QTOF mass spectrometric studies and the most likely degradation pathway of the drug was proposed. In silico toxicity assessment of the drug and its degradation products was carried out, which indicated that DP3 and DP4 carry a mutagenicity alert.
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Affiliation(s)
- Nishant Salunke
- Department of Chemistry, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be University), Mumbai, Maharashtra, India
| | - Prashant S Kharkar
- Department of Pharmaceutical Chemistry, Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, SVKM's NMIMS (Deemed-to-be University), Mumbai, Maharashtra, India
| | - Nancy Pandita
- Department of Chemistry, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be University), Mumbai, Maharashtra, India
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Teasdale A, Elder DP. Analytical control strategies for mutagenic impurities: Current challenges and future opportunities? Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.10.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Thummar M, Swain D, Gananadhamu S. Separation and Characterization of New Forced Degradation Products of Macitentan: A Dual Endothelin Receptor Antagonist. Chromatographia 2018. [DOI: 10.1007/s10337-018-3471-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Zhou N, Qian Q, Qi P, Zhao J, Wang C, Wang Q. Identification of Degradation Products and Process Impurities from Terbutaline Sulfate by UHPLC-Q-TOF-MS/MS and In Silico Toxicity Prediction. Chromatographia 2017. [DOI: 10.1007/s10337-017-3259-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ikuta Y, Aoyagi S, Tanaka Y, Sato K, Inada S, Koseki Y, Onodera T, Oikawa H, Kasai H. Creation of nano eye-drops and effective drug delivery to the interior of the eye. Sci Rep 2017; 7:44229. [PMID: 28290486 PMCID: PMC5349510 DOI: 10.1038/srep44229] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 02/06/2017] [Indexed: 01/22/2023] Open
Abstract
Nano eye-drops are a new type of ophthalmic treatment with increased potency and reduced side effects. Compounds in conventional eye-drops barely penetrate into the eye because the cornea, located at the surface of eye, has a strong barrier function for preventing invasion of hydrophilic or large-sized materials from the outside. In this work, we describe the utility of nano eye-drops utilising brinzolamide, a commercially available glaucoma treatment drug, as a target compound. Fabrication of the nanoparticles of brinzolamide prodrug increases the eye penetration rate and results in high drug efficacy, compared with that of commercially available brinzolamide eye-drops formulated as micro-sized structures. In addition, the resulting nano eye-drops were not toxic to the corneal epithelium after repeated administration for 1 week. The nano eye-drops may have applications as a next-generation ophthalmic treatment.
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Affiliation(s)
- Yoshikazu Ikuta
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Shigenobu Aoyagi
- Ouchi Shinko Chemical Industrial Co., Ltd., Research and Development Center, 111 Shimojyukumae, Sukagawa, Fukushima 962-0806, Japan
| | - Yuji Tanaka
- Graduate School of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Kota Sato
- Graduate School of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Satoshi Inada
- Ouchi Shinko Chemical Industrial Co., Ltd., Research and Development Center, 111 Shimojyukumae, Sukagawa, Fukushima 962-0806, Japan
| | - Yoshitaka Koseki
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Tsunenobu Onodera
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Hidetoshi Oikawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Hitoshi Kasai
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
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